I have a custom frame on the way from a builder in italy. When I gave him my measurements, I told him that I wanted to use a 120mm stem, and that I wanted aggressive geometry.

It just occurred to me that I have to decide between a straight or setback seatpost.
I emailed the shop, and they told me they'd ask the builder, but "We advice ever setback seatpost." yes, there's a language barrier. I won't have an answer (or the frame) for a little while.

So in the interim, i'm wondering - if someone was building a bike, would they design it for a setback seatpost or a straight one?

if i remember correctly i don't think i've ever owned a bike with a straight seatpost. it seems like the default is setback.

here's a pic of the frame, btw.